Viscosity is a fundamental property for diesel or compression ignition engine fuels. In this paper, empirical correlations, similar to Andrade equation, for predicting the effect of temperature on kinematic and absolute viscosity of biodiesel fuels are presented. Three different biodiesel samples produced from crude palm oil and its olein and estearin phases were utilized. Additionally, the kinematic viscosity – temperature behavior for five biodiesel-diesel blends (B5, B10, B15, B20 y B30) is analyzed. Finally, a correlation for predicting the kinematic viscosity at 40 oC for biodiesel-diesel blends as a function of biodiesel percent is presented.